DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT, Classification of outstanding financial instruments (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Derivative Assets [Abstract]
Derivative Assets, Current	$ 64,611,558	$ 128,893,220
Derivative Assets, Noncurrent	0	25,013,011
Derivative Liabilities [Abstract]
Derivative Liabilities, Noncurrent	0	(579,070)
Total Derivatives Liabilities	0	(579,070)
Total Assets [Member]
Derivative Assets [Abstract]
Total Derivatives Assets	64,611,558	153,906,231
Swap Contracts [Member] | Current Assets/Liabilities [Member]
Derivative Assets [Abstract]
Derivative Assets, Current	64,611,558	128,893,220
Swap Contracts [Member] | Non-Current Assets/Liabilities [Member]
Derivative Assets [Abstract]
Derivative Assets, Noncurrent	0	25,013,011
Swaption Contracts [Member] | Non-Current Assets/Liabilities [Member]
Derivative Liabilities [Abstract]
Derivative Liabilities, Noncurrent	$ 0	$ (579,070)